/*
mediastreamer2 library - modular sound and video processing and streaming
Copyright (C) 2010  Simon MORLAT (simon.morlat@linphone.org)

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/
#ifndef msaudiomixer_h
#define msaudiomixer_h

#include <mediastreamer2/msfilter.h>

typedef struct MSAudioMixerCtl{
	int pin;
	union param_t { 
		float gain; /**<gain correction */
		int active; /**< to mute or unmute the input channel */
		int enabled; /**< to mute/unmute the output channel*/
	} param;
} MSAudioMixerCtl;

#define MS_AUDIO_MIXER_SET_INPUT_GAIN			MS_FILTER_METHOD(MS_AUDIO_MIXER_ID,0,MSAudioMixerCtl)
/** Tells whether channel contributes to the mix.*/
#define MS_AUDIO_MIXER_SET_ACTIVE			MS_FILTER_METHOD(MS_AUDIO_MIXER_ID,1,MSAudioMixerCtl)
#define MS_AUDIO_MIXER_ENABLE_CONFERENCE_MODE		MS_FILTER_METHOD(MS_AUDIO_MIXER_ID,2,int)

/**The master channel is the one that is used to synchronize the others. No flow control is done on the master channel*/
#define MS_AUDIO_MIXER_SET_MASTER_CHANNEL		MS_FILTER_METHOD(MS_AUDIO_MIXER_ID,3,int)

#define MS_AUDIO_MIXER_ENABLE_OUTPUT			MS_FILTER_METHOD(MS_AUDIO_MIXER_ID,4,MSAudioMixerCtl)
#endif
